The story
Originally formed in 1985 from the merger and privatisation of the British Shipbuilders Research Association (BSRA) and the National Maritime Institute (NMI), it enjoyed tax-free status as a scientific research association for more than a decade.
BMT's heritage includes the water tanks where the famous Bouncing Bomb, used in the Dambusters Raid, was developed during World War II, as well as more recent advances in computer-aided design and aerodynamics.
From Wikipedia’s article on BMT Group, shared under CC BY-SA 4.0.5